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/*
 *   fs/cifs/connect.c
 *
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 *   Copyright (C) International Business Machines  Corp., 2002,2006
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 *   Author(s): Steve French (sfrench@us.ibm.com)
 *
 *   This library is free software; you can redistribute it and/or modify
 *   it under the terms of the GNU Lesser General Public License as published
 *   by the Free Software Foundation; either version 2.1 of the License, or
 *   (at your option) any later version.
 *
 *   This library is distributed in the hope that it will be useful,
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
 *   the GNU Lesser General Public License for more details.
 *
 *   You should have received a copy of the GNU Lesser General Public License
 *   along with this library; if not, write to the Free Software
 *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 
 */
#include <linux/fs.h>
#include <linux/net.h>
#include <linux/string.h>
#include <linux/list.h>
#include <linux/wait.h>
#include <linux/ipv6.h>
#include <linux/pagemap.h>
#include <linux/ctype.h>
#include <linux/utsname.h>
#include <linux/mempool.h>
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#include <linux/delay.h>
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#include <linux/completion.h>
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#include <linux/pagevec.h>
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#include <asm/uaccess.h>
#include <asm/processor.h>
#include "cifspdu.h"
#include "cifsglob.h"
#include "cifsproto.h"
#include "cifs_unicode.h"
#include "cifs_debug.h"
#include "cifs_fs_sb.h"
#include "ntlmssp.h"
#include "nterr.h"
#include "rfc1002pdu.h"
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#include "cn_cifs.h"
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#define CIFS_PORT 445
#define RFC1001_PORT 139

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static DECLARE_COMPLETION(cifsd_complete);

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extern void SMBencrypt(unsigned char *passwd, unsigned char *c8,
		       unsigned char *p24);
extern void SMBNTencrypt(unsigned char *passwd, unsigned char *c8,
			 unsigned char *p24);

extern mempool_t *cifs_req_poolp;

struct smb_vol {
	char *username;
	char *password;
	char *domainname;
	char *UNC;
	char *UNCip;
	char *in6_addr;  /* ipv6 address as human readable form of in6_addr */
	char *iocharset;  /* local code page for mapping to and from Unicode */
	char source_rfc1001_name[16]; /* netbios name of client */
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	char target_rfc1001_name[16]; /* netbios name of server for Win9x/ME */
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	uid_t linux_uid;
	gid_t linux_gid;
	mode_t file_mode;
	mode_t dir_mode;
	unsigned rw:1;
	unsigned retry:1;
	unsigned intr:1;
	unsigned setuids:1;
	unsigned noperm:1;
	unsigned no_psx_acl:1; /* set if posix acl support should be disabled */
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	unsigned cifs_acl:1;
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	unsigned no_xattr:1;   /* set if xattr (EA) support should be disabled*/
	unsigned server_ino:1; /* use inode numbers from server ie UniqueId */
	unsigned direct_io:1;
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	unsigned remap:1;   /* set to remap seven reserved chars in filenames */
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	unsigned posix_paths:1;   /* unset to not ask for posix pathnames. */
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	unsigned sfu_emul:1;
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	unsigned krb5:1;
	unsigned ntlm:1;
	unsigned ntlmv2:1;
	unsigned nullauth:1; /* attempt to authenticate with null user */
	unsigned sign:1;
	unsigned seal:1;     /* encrypt */
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	unsigned nocase;     /* request case insensitive filenames */
	unsigned nobrl;      /* disable sending byte range locks to srv */
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	unsigned int rsize;
	unsigned int wsize;
	unsigned int sockopt;
	unsigned short int port;
};

static int ipv4_connect(struct sockaddr_in *psin_server, 
			struct socket **csocket,
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			char * netb_name,
			char * server_netb_name);
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static int ipv6_connect(struct sockaddr_in6 *psin_server, 
			struct socket **csocket);


	/* 
	 * cifs tcp session reconnection
	 * 
	 * mark tcp session as reconnecting so temporarily locked
	 * mark all smb sessions as reconnecting for tcp session
	 * reconnect tcp session
	 * wake up waiters on reconnection? - (not needed currently)
	 */

int
cifs_reconnect(struct TCP_Server_Info *server)
{
	int rc = 0;
	struct list_head *tmp;
	struct cifsSesInfo *ses;
	struct cifsTconInfo *tcon;
	struct mid_q_entry * mid_entry;
	
	spin_lock(&GlobalMid_Lock);
	if(server->tcpStatus == CifsExiting) {
		/* the demux thread will exit normally 
		next time through the loop */
		spin_unlock(&GlobalMid_Lock);
		return rc;
	} else
		server->tcpStatus = CifsNeedReconnect;
	spin_unlock(&GlobalMid_Lock);
	server->maxBuf = 0;

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	cFYI(1, ("Reconnecting tcp session"));
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	/* before reconnecting the tcp session, mark the smb session (uid)
		and the tid bad so they are not used until reconnected */
	read_lock(&GlobalSMBSeslock);
	list_for_each(tmp, &GlobalSMBSessionList) {
		ses = list_entry(tmp, struct cifsSesInfo, cifsSessionList);
		if (ses->server) {
			if (ses->server == server) {
				ses->status = CifsNeedReconnect;
				ses->ipc_tid = 0;
			}
		}
		/* else tcp and smb sessions need reconnection */
	}
	list_for_each(tmp, &GlobalTreeConnectionList) {
		tcon = list_entry(tmp, struct cifsTconInfo, cifsConnectionList);
		if((tcon) && (tcon->ses) && (tcon->ses->server == server)) {
			tcon->tidStatus = CifsNeedReconnect;
		}
	}
	read_unlock(&GlobalSMBSeslock);
	/* do not want to be sending data on a socket we are freeing */
	down(&server->tcpSem); 
	if(server->ssocket) {
		cFYI(1,("State: 0x%x Flags: 0x%lx", server->ssocket->state,
			server->ssocket->flags));
		server->ssocket->ops->shutdown(server->ssocket,SEND_SHUTDOWN);
		cFYI(1,("Post shutdown state: 0x%x Flags: 0x%lx", server->ssocket->state,
			server->ssocket->flags));
		sock_release(server->ssocket);
		server->ssocket = NULL;
	}

	spin_lock(&GlobalMid_Lock);
	list_for_each(tmp, &server->pending_mid_q) {
		mid_entry = list_entry(tmp, struct
					mid_q_entry,
					qhead);
		if(mid_entry) {
			if(mid_entry->midState == MID_REQUEST_SUBMITTED) {
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				/* Mark other intransit requests as needing
				   retry so we do not immediately mark the
				   session bad again (ie after we reconnect
				   below) as they timeout too */
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				mid_entry->midState = MID_RETRY_NEEDED;
			}
		}
	}
	spin_unlock(&GlobalMid_Lock);
	up(&server->tcpSem); 

	while ((server->tcpStatus != CifsExiting) && (server->tcpStatus != CifsGood))
	{
		if(server->protocolType == IPV6) {
			rc = ipv6_connect(&server->addr.sockAddr6,&server->ssocket);
		} else {
			rc = ipv4_connect(&server->addr.sockAddr, 
					&server->ssocket,
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					server->workstation_RFC1001_name,
					server->server_RFC1001_name);
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		}
		if(rc) {
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			cFYI(1,("reconnect error %d",rc));
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			msleep(3000);
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		} else {
			atomic_inc(&tcpSesReconnectCount);
			spin_lock(&GlobalMid_Lock);
			if(server->tcpStatus != CifsExiting)
				server->tcpStatus = CifsGood;
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			server->sequence_number = 0;
			spin_unlock(&GlobalMid_Lock);			
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	/*		atomic_set(&server->inFlight,0);*/
			wake_up(&server->response_q);
		}
	}
	return rc;
}

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/* 
	return codes:
		0 	not a transact2, or all data present
		>0 	transact2 with that much data missing
		-EINVAL = invalid transact2

 */
static int check2ndT2(struct smb_hdr * pSMB, unsigned int maxBufSize)
{
	struct smb_t2_rsp * pSMBt;
        int total_data_size;
	int data_in_this_rsp;
	int remaining;

	if(pSMB->Command != SMB_COM_TRANSACTION2)
		return 0;

        /* check for plausible wct, bcc and t2 data and parm sizes */
        /* check for parm and data offset going beyond end of smb */
	if(pSMB->WordCount != 10) { /* coalesce_t2 depends on this */
		cFYI(1,("invalid transact2 word count"));
		return -EINVAL;
	}

	pSMBt = (struct smb_t2_rsp *)pSMB;

	total_data_size = le16_to_cpu(pSMBt->t2_rsp.TotalDataCount);
	data_in_this_rsp = le16_to_cpu(pSMBt->t2_rsp.DataCount);

	remaining = total_data_size - data_in_this_rsp;

	if(remaining == 0)
		return 0;
	else if(remaining < 0) {
		cFYI(1,("total data %d smaller than data in frame %d",
			total_data_size, data_in_this_rsp));
		return -EINVAL;
	} else {
		cFYI(1,("missing %d bytes from transact2, check next response",
			remaining));
		if(total_data_size > maxBufSize) {
			cERROR(1,("TotalDataSize %d is over maximum buffer %d",
				total_data_size,maxBufSize));
			return -EINVAL; 
		}
		return remaining;
	}
}

static int coalesce_t2(struct smb_hdr * psecond, struct smb_hdr *pTargetSMB)
{
	struct smb_t2_rsp *pSMB2 = (struct smb_t2_rsp *)psecond;
	struct smb_t2_rsp *pSMBt  = (struct smb_t2_rsp *)pTargetSMB;
	int total_data_size;
	int total_in_buf;
	int remaining;
	int total_in_buf2;
	char * data_area_of_target;
	char * data_area_of_buf2;
	__u16 byte_count;

	total_data_size = le16_to_cpu(pSMBt->t2_rsp.TotalDataCount);

	if(total_data_size != le16_to_cpu(pSMB2->t2_rsp.TotalDataCount)) {
		cFYI(1,("total data sizes of primary and secondary t2 differ"));
	}

	total_in_buf = le16_to_cpu(pSMBt->t2_rsp.DataCount);

	remaining = total_data_size - total_in_buf;
	
	if(remaining < 0)
		return -EINVAL;

	if(remaining == 0) /* nothing to do, ignore */
		return 0;
	
	total_in_buf2 = le16_to_cpu(pSMB2->t2_rsp.DataCount);
	if(remaining < total_in_buf2) {
		cFYI(1,("transact2 2nd response contains too much data"));
	}

	/* find end of first SMB data area */
	data_area_of_target = (char *)&pSMBt->hdr.Protocol + 
				le16_to_cpu(pSMBt->t2_rsp.DataOffset);
	/* validate target area */

	data_area_of_buf2 = (char *) &pSMB2->hdr.Protocol +
                                        le16_to_cpu(pSMB2->t2_rsp.DataOffset);

	data_area_of_target += total_in_buf;

	/* copy second buffer into end of first buffer */
	memcpy(data_area_of_target,data_area_of_buf2,total_in_buf2);
	total_in_buf += total_in_buf2;
	pSMBt->t2_rsp.DataCount = cpu_to_le16(total_in_buf);
	byte_count = le16_to_cpu(BCC_LE(pTargetSMB));
	byte_count += total_in_buf2;
	BCC_LE(pTargetSMB) = cpu_to_le16(byte_count);

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	byte_count = pTargetSMB->smb_buf_length;
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	byte_count += total_in_buf2;

	/* BB also add check that we are not beyond maximum buffer size */
		
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	pTargetSMB->smb_buf_length = byte_count;
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	if(remaining == total_in_buf2) {
		cFYI(1,("found the last secondary response"));
		return 0; /* we are done */
	} else /* more responses to go */
		return 1;

}

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static int
cifs_demultiplex_thread(struct TCP_Server_Info *server)
{
	int length;
	unsigned int pdu_length, total_read;
	struct smb_hdr *smb_buffer = NULL;
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	struct smb_hdr *bigbuf = NULL;
	struct smb_hdr *smallbuf = NULL;
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	struct msghdr smb_msg;
	struct kvec iov;
	struct socket *csocket = server->ssocket;
	struct list_head *tmp;
	struct cifsSesInfo *ses;
	struct task_struct *task_to_wake = NULL;
	struct mid_q_entry *mid_entry;
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	char temp;
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	int isLargeBuf = FALSE;
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	int isMultiRsp;
	int reconnect;
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	daemonize("cifsd");
	allow_signal(SIGKILL);
	current->flags |= PF_MEMALLOC;
	server->tsk = current;	/* save process info to wake at shutdown */
	cFYI(1, ("Demultiplex PID: %d", current->pid));
	write_lock(&GlobalSMBSeslock); 
	atomic_inc(&tcpSesAllocCount);
	length = tcpSesAllocCount.counter;
	write_unlock(&GlobalSMBSeslock);
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	complete(&cifsd_complete);
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	if(length  > 1) {
		mempool_resize(cifs_req_poolp,
			length + cifs_min_rcv,
			GFP_KERNEL);
	}

	while (server->tcpStatus != CifsExiting) {
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		if (try_to_freeze())
			continue;
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		if (bigbuf == NULL) {
			bigbuf = cifs_buf_get();
			if(bigbuf == NULL) {
				cERROR(1,("No memory for large SMB response"));
				msleep(3000);
				/* retry will check if exiting */
				continue;
			}
		} else if(isLargeBuf) {
			/* we are reusing a dirtry large buf, clear its start */
			memset(bigbuf, 0, sizeof (struct smb_hdr));
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		}
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		if (smallbuf == NULL) {
			smallbuf = cifs_small_buf_get();
			if(smallbuf == NULL) {
				cERROR(1,("No memory for SMB response"));
				msleep(1000);
				/* retry will check if exiting */
				continue;
			}
			/* beginning of smb buffer is cleared in our buf_get */
		} else /* if existing small buf clear beginning */
			memset(smallbuf, 0, sizeof (struct smb_hdr));

		isLargeBuf = FALSE;
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		isMultiRsp = FALSE;
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		smb_buffer = smallbuf;
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		iov.iov_base = smb_buffer;
		iov.iov_len = 4;
		smb_msg.msg_control = NULL;
		smb_msg.msg_controllen = 0;
		length =
		    kernel_recvmsg(csocket, &smb_msg,
				 &iov, 1, 4, 0 /* BB see socket.h flags */);

		if(server->tcpStatus == CifsExiting) {
			break;
		} else if (server->tcpStatus == CifsNeedReconnect) {
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			cFYI(1,("Reconnect after server stopped responding"));
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			cifs_reconnect(server);
			cFYI(1,("call to reconnect done"));
			csocket = server->ssocket;
			continue;
		} else if ((length == -ERESTARTSYS) || (length == -EAGAIN)) {
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			msleep(1); /* minimum sleep to prevent looping
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				allowing socket to clear and app threads to set
				tcpStatus CifsNeedReconnect if server hung */
			continue;
		} else if (length <= 0) {
			if(server->tcpStatus == CifsNew) {
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				cFYI(1,("tcp session abend after SMBnegprot"));
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				/* some servers kill the TCP session rather than
				   returning an SMB negprot error, in which
				   case reconnecting here is not going to help,
				   and so simply return error to mount */
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				break;
			}
			if(length == -EINTR) { 
				cFYI(1,("cifsd thread killed"));
				break;
			}
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			cFYI(1,("Reconnect after unexpected peek error %d",
				length));
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			cifs_reconnect(server);
			csocket = server->ssocket;
			wake_up(&server->response_q);
			continue;
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		} else if (length < 4) {
			cFYI(1,
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			    ("Frame under four bytes received (%d bytes long)",
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			      length));
			cifs_reconnect(server);
			csocket = server->ssocket;
			wake_up(&server->response_q);
			continue;
		}
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		/* The right amount was read from socket - 4 bytes */
		/* so we can now interpret the length field */
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		/* the first byte big endian of the length field,
		is actually not part of the length but the type
		with the most common, zero, as regular data */
		temp = *((char *) smb_buffer);
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		/* Note that FC 1001 length is big endian on the wire, 
		but we convert it here so it is always manipulated
		as host byte order */
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		pdu_length = ntohl(smb_buffer->smb_buf_length);
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		smb_buffer->smb_buf_length = pdu_length;

		cFYI(1,("rfc1002 length 0x%x)", pdu_length+4));
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		if (temp == (char) RFC1002_SESSION_KEEP_ALIVE) {
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			continue; 
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		} else if (temp == (char)RFC1002_POSITIVE_SESSION_RESPONSE) {
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			cFYI(1,("Good RFC 1002 session rsp"));
			continue;
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		} else if (temp == (char)RFC1002_NEGATIVE_SESSION_RESPONSE) {
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			/* we get this from Windows 98 instead of 
			   an error on SMB negprot response */
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			cFYI(1,("Negative RFC1002 Session Response Error 0x%x)",
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				pdu_length));
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			if(server->tcpStatus == CifsNew) {
				/* if nack on negprot (rather than 
				ret of smb negprot error) reconnecting
				not going to help, ret error to mount */
				break;
			} else {
				/* give server a second to
				clean up before reconnect attempt */
				msleep(1000);
				/* always try 445 first on reconnect
				since we get NACK on some if we ever
				connected to port 139 (the NACK is 
				since we do not begin with RFC1001
				session initialize frame) */
				server->addr.sockAddr.sin_port = 
					htons(CIFS_PORT);
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				cifs_reconnect(server);
				csocket = server->ssocket;
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				wake_up(&server->response_q);
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				continue;
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			}
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		} else if (temp != (char) 0) {
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			cERROR(1,("Unknown RFC 1002 frame"));
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			cifs_dump_mem(" Received Data: ", (char *)smb_buffer,
				      length);
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			cifs_reconnect(server);
			csocket = server->ssocket;
			continue;
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		}

		/* else we have an SMB response */
		if((pdu_length > CIFSMaxBufSize + MAX_CIFS_HDR_SIZE - 4) ||
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			    (pdu_length < sizeof (struct smb_hdr) - 1 - 4)) {
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			cERROR(1, ("Invalid size SMB length %d pdu_length %d",
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					length, pdu_length+4));
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			cifs_reconnect(server);
			csocket = server->ssocket;
			wake_up(&server->response_q);
			continue;
		} 

		/* else length ok */
		reconnect = 0;

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		if(pdu_length > MAX_CIFS_SMALL_BUFFER_SIZE - 4) {
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			isLargeBuf = TRUE;
			memcpy(bigbuf, smallbuf, 4);
			smb_buffer = bigbuf;
		}
		length = 0;
		iov.iov_base = 4 + (char *)smb_buffer;
		iov.iov_len = pdu_length;
		for (total_read = 0; total_read < pdu_length; 
		     total_read += length) {
			length = kernel_recvmsg(csocket, &smb_msg, &iov, 1,
						pdu_length - total_read, 0);
			if((server->tcpStatus == CifsExiting) ||
			    (length == -EINTR)) {
				/* then will exit */
				reconnect = 2;
				break;
			} else if (server->tcpStatus == CifsNeedReconnect) {
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				cifs_reconnect(server);
				csocket = server->ssocket;
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			        /* Reconnect wakes up rspns q */
				/* Now we will reread sock */
				reconnect = 1;
				break;
			} else if ((length == -ERESTARTSYS) || 
				   (length == -EAGAIN)) {
				msleep(1); /* minimum sleep to prevent looping,
                                              allowing socket to clear and app 
					      threads to set tcpStatus
					      CifsNeedReconnect if server hung*/
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				continue;
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			} else if (length <= 0) {
				cERROR(1,("Received no data, expecting %d",
					      pdu_length - total_read));
				cifs_reconnect(server);
				csocket = server->ssocket;
				reconnect = 1;
				break;
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			}
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		}
		if(reconnect == 2)
			break;
		else if(reconnect == 1)
			continue;
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		length += 4; /* account for rfc1002 hdr */
	
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		dump_smb(smb_buffer, length);
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		if (checkSMB(smb_buffer, smb_buffer->Mid, total_read+4)) {
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			cifs_dump_mem("Bad SMB: ", smb_buffer, 48);
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			continue;
		}
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		task_to_wake = NULL;
		spin_lock(&GlobalMid_Lock);
		list_for_each(tmp, &server->pending_mid_q) {
			mid_entry = list_entry(tmp, struct mid_q_entry, qhead);

			if ((mid_entry->mid == smb_buffer->Mid) && 
			    (mid_entry->midState == MID_REQUEST_SUBMITTED) &&
			    (mid_entry->command == smb_buffer->Command)) {
				if(check2ndT2(smb_buffer,server->maxBuf) > 0) {
					/* We have a multipart transact2 resp */
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					isMultiRsp = TRUE;
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					if(mid_entry->resp_buf) {
						/* merge response - fix up 1st*/
						if(coalesce_t2(smb_buffer, 
							mid_entry->resp_buf)) {
							break;
						} else {
							/* all parts received */
							goto multi_t2_fnd; 
						}
					} else {
						if(!isLargeBuf) {
							cERROR(1,("1st trans2 resp needs bigbuf"));
					/* BB maybe we can fix this up,  switch
				   	   to already allocated large buffer? */
						} else {
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							/* Have first buffer */
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							mid_entry->resp_buf =
								 smb_buffer;
							mid_entry->largeBuf = 1;
							bigbuf = NULL;
						}
					}
					break;
				} 
				mid_entry->resp_buf = smb_buffer;
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				if(isLargeBuf)
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					mid_entry->largeBuf = 1;
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				else
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					mid_entry->largeBuf = 0;
multi_t2_fnd:
				task_to_wake = mid_entry->tsk;
				mid_entry->midState = MID_RESPONSE_RECEIVED;
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#ifdef CONFIG_CIFS_STATS2
				mid_entry->when_received = jiffies;
#endif
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				break;
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			}
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		}
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		spin_unlock(&GlobalMid_Lock);
		if (task_to_wake) {
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			/* Was previous buf put in mpx struct for multi-rsp? */
			if(!isMultiRsp) {
				/* smb buffer will be freed by user thread */
				if(isLargeBuf) {
					bigbuf = NULL;
				} else
					smallbuf = NULL;
			}
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			wake_up_process(task_to_wake);
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		} else if ((is_valid_oplock_break(smb_buffer, server) == FALSE)
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		    && (isMultiRsp == FALSE)) {                          
			cERROR(1, ("No task to wake, unknown frame rcvd!"));
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			cifs_dump_mem("Received Data is: ",(char *)smb_buffer,
				      sizeof(struct smb_hdr));
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		}
	} /* end while !EXITING */

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	spin_lock(&GlobalMid_Lock);
	server->tcpStatus = CifsExiting;
	server->tsk = NULL;
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	/* check if we have blocked requests that need to free */
	/* Note that cifs_max_pending is normally 50, but
	can be set at module install time to as little as two */
	if(atomic_read(&server->inFlight) >= cifs_max_pending)
		atomic_set(&server->inFlight, cifs_max_pending - 1);
	/* We do not want to set the max_pending too low or we
	could end up with the counter going negative */
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	spin_unlock(&GlobalMid_Lock);
	/* Although there should not be any requests blocked on 
	this queue it can not hurt to be paranoid and try to wake up requests
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	that may haven been blocked when more than 50 at time were on the wire
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	to the same server - they now will see the session is in exit state
	and get out of SendReceive.  */
	wake_up_all(&server->request_q);
	/* give those requests time to exit */
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	msleep(125);
	
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	if(server->ssocket) {
		sock_release(csocket);
		server->ssocket = NULL;
	}
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	/* buffer usuallly freed in free_mid - need to free it here on exit */
	if (bigbuf != NULL)
		cifs_buf_release(bigbuf);
	if (smallbuf != NULL)
		cifs_small_buf_release(smallbuf);
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	read_lock(&GlobalSMBSeslock);
	if (list_empty(&server->pending_mid_q)) {
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		/* loop through server session structures attached to this and
		    mark them dead */
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		list_for_each(tmp, &GlobalSMBSessionList) {
			ses =
			    list_entry(tmp, struct cifsSesInfo,
				       cifsSessionList);
			if (ses->server == server) {
				ses->status = CifsExiting;
				ses->server = NULL;
			}
		}
		read_unlock(&GlobalSMBSeslock);
	} else {
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		/* although we can not zero the server struct pointer yet,
		since there are active requests which may depnd on them,
		mark the corresponding SMB sessions as exiting too */
		list_for_each(tmp, &GlobalSMBSessionList) {
			ses = list_entry(tmp, struct cifsSesInfo,
					 cifsSessionList);
			if (ses->server == server) {
				ses->status = CifsExiting;
			}
		}

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		spin_lock(&GlobalMid_Lock);
		list_for_each(tmp, &server->pending_mid_q) {
		mid_entry = list_entry(tmp, struct mid_q_entry, qhead);
			if (mid_entry->midState == MID_REQUEST_SUBMITTED) {
				cFYI(1,
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				  ("Clearing Mid 0x%x - waking up ",mid_entry->mid));
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				task_to_wake = mid_entry->tsk;
				if(task_to_wake) {
					wake_up_process(task_to_wake);
				}
			}
		}
		spin_unlock(&GlobalMid_Lock);
		read_unlock(&GlobalSMBSeslock);
		/* 1/8th of sec is more than enough time for them to exit */
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		msleep(125);
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	}

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	if (!list_empty(&server->pending_mid_q)) {
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		/* mpx threads have not exited yet give them 
		at least the smb send timeout time for long ops */
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		/* due to delays on oplock break requests, we need
		to wait at least 45 seconds before giving up
		on a request getting a response and going ahead
		and killing cifsd */
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		cFYI(1, ("Wait for exit from demultiplex thread"));
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		msleep(46000);
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		/* if threads still have not exited they are probably never
		coming home not much else we can do but free the memory */
	}

	write_lock(&GlobalSMBSeslock);
	atomic_dec(&tcpSesAllocCount);
	length = tcpSesAllocCount.counter;
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	/* last chance to mark ses pointers invalid
	if there are any pointing to this (e.g
	if a crazy root user tried to kill cifsd 
	kernel thread explicitly this might happen) */
	list_for_each(tmp, &GlobalSMBSessionList) {
		ses = list_entry(tmp, struct cifsSesInfo,
				cifsSessionList);
		if (ses->server == server) {
			ses->server = NULL;
		}
	}
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	write_unlock(&GlobalSMBSeslock);
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	kfree(server);
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	if(length  > 0) {
		mempool_resize(cifs_req_poolp,
			length + cifs_min_rcv,
			GFP_KERNEL);
	}
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	complete_and_exit(&cifsd_complete, 0);
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	return 0;
}

static int
cifs_parse_mount_options(char *options, const char *devname,struct smb_vol *vol)
{
	char *value;
	char *data;
	unsigned int  temp_len, i, j;
	char separator[2];

	separator[0] = ',';
	separator[1] = 0; 

	memset(vol->source_rfc1001_name,0x20,15);
	for(i=0;i < strnlen(system_utsname.nodename,15);i++) {
		/* does not have to be a perfect mapping since the field is
		informational, only used for servers that do not support
		port 445 and it can be overridden at mount time */
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		vol->source_rfc1001_name[i] = 
			toupper(system_utsname.nodename[i]);
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	}
	vol->source_rfc1001_name[15] = 0;
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	/* null target name indicates to use *SMBSERVR default called name
	   if we end up sending RFC1001 session initialize */
	vol->target_rfc1001_name[0] = 0;
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	vol->linux_uid = current->uid;	/* current->euid instead? */
	vol->linux_gid = current->gid;
	vol->dir_mode = S_IRWXUGO;
	/* 2767 perms indicate mandatory locking support */
	vol->file_mode = S_IALLUGO & ~(S_ISUID | S_IXGRP);

	/* vol->retry default is 0 (i.e. "soft" limited retry not hard retry) */
	vol->rw = TRUE;
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	vol->ntlm = TRUE;
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	/* default is always to request posix paths. */
	vol->posix_paths = 1;

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	if (!options)
		return 1;

	if(strncmp(options,"sep=",4) == 0) {
		if(options[4] != 0) {
			separator[0] = options[4];
			options += 5;
		} else {
			cFYI(1,("Null separator not allowed"));
		}
	}
		
	while ((data = strsep(&options, separator)) != NULL) {
		if (!*data)
			continue;
		if ((value = strchr(data, '=')) != NULL)
			*value++ = '\0';

		if (strnicmp(data, "user_xattr",10) == 0) {/*parse before user*/
			vol->no_xattr = 0;
		} else if (strnicmp(data, "nouser_xattr",12) == 0) {
			vol->no_xattr = 1;
		} else if (strnicmp(data, "user", 4) == 0) {
			if (!value || !*value) {
				printk(KERN_WARNING
				       "CIFS: invalid or missing username\n");
				return 1;	/* needs_arg; */
			}
			if (strnlen(value, 200) < 200) {
				vol->username = value;
			} else {
				printk(KERN_WARNING "CIFS: username too long\n");
				return 1;
			}
		} else if (strnicmp(data, "pass", 4) == 0) {
			if (!value) {
				vol->password = NULL;
				continue;
			} else if(value[0] == 0) {
				/* check if string begins with double comma
				   since that would mean the password really
				   does start with a comma, and would not
				   indicate an empty string */
				if(value[1] != separator[0]) {
					vol->password = NULL;
					continue;
				}
			}
			temp_len = strlen(value);
			/* removed password length check, NTLM passwords
				can be arbitrarily long */

			/* if comma in password, the string will be 
			prematurely null terminated.  Commas in password are
			specified across the cifs mount interface by a double
			comma ie ,, and a comma used as in other cases ie ','
			as a parameter delimiter/separator is single and due
			to the strsep above is temporarily zeroed. */

			/* NB: password legally can have multiple commas and
			the only illegal character in a password is null */

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			if ((value[temp_len] == 0) && 
			    (value[temp_len+1] == separator[0])) {
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				/* reinsert comma */
				value[temp_len] = separator[0];
				temp_len+=2;  /* move after the second comma */
				while(value[temp_len] != 0)  {
					if (value[temp_len] == separator[0]) {
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						if (value[temp_len+1] == 
						     separator[0]) {
						/* skip second comma */
							temp_len++;
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						} else { 
						/* single comma indicating start
							 of next parm */
							break;
						}
					}
					temp_len++;
				}
				if(value[temp_len] == 0) {
					options = NULL;
				} else {
					value[temp_len] = 0;
					/* point option to start of next parm */
					options = value + temp_len + 1;
				}
				/* go from value to value + temp_len condensing 
				double commas to singles. Note that this ends up
				allocating a few bytes too many, which is ok */
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				vol->password = kzalloc(temp_len, GFP_KERNEL);
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				if(vol->password == NULL) {
					printk("CIFS: no memory for pass\n");
					return 1;
				}
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				for(i=0,j=0;i<temp_len;i++,j++) {
					vol->password[j] = value[i];
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					if(value[i] == separator[0]
						&& value[i+1] == separator[0]) {
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						/* skip second comma */
						i++;
					}
				}
				vol->password[j] = 0;
			} else {
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				vol->password = kzalloc(temp_len+1, GFP_KERNEL);
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				if(vol->password == NULL) {
					printk("CIFS: no memory for pass\n");
					return 1;
				}
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				strcpy(vol->password, value);
			}
		} else if (strnicmp(data, "ip", 2) == 0) {
			if (!value || !*value) {
				vol->UNCip = NULL;
			} else if (strnlen(value, 35) < 35) {
				vol->UNCip = value;
			} else {
				printk(KERN_WARNING "CIFS: ip address too long\n");
				return 1;
			}
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                } else if (strnicmp(data, "sec", 3) == 0) { 
                        if (!value || !*value) {
				cERROR(1,("no security value specified"));
                                continue;
                        } else if (strnicmp(value, "krb5i", 5) == 0) {
				vol->sign = 1;
				vol->krb5 = 1;
			} else if (strnicmp(value, "krb5p", 5) == 0) {
				/* vol->seal = 1; 
				   vol->krb5 = 1; */
				cERROR(1,("Krb5 cifs privacy not supported"));
				return 1;
			} else if (strnicmp(value, "krb5", 4) == 0) {
				vol->krb5 = 1;
			} else if (strnicmp(value, "ntlmv2i", 7) == 0) {
				vol->ntlmv2 = 1;
				vol->sign = 1;
			} else if (strnicmp(value, "ntlmv2", 6) == 0) {
				vol->ntlmv2 = 1;
			} else if (strnicmp(value, "ntlmi", 5) == 0) {
				vol->ntlm = 1;
				vol->sign = 1;
			} else if (strnicmp(value, "ntlm", 4) == 0) {
				/* ntlm is default so can be turned off too */
				vol->ntlm = 1;
			} else if (strnicmp(value, "nontlm", 6) == 0) {
				vol->ntlm = 0;
			} else if (strnicmp(value, "none", 4) == 0) {
				vol->nullauth = 1; 
                        } else {
                                cERROR(1,("bad security option: %s", value));
                                return 1;
                        }
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		} else if ((strnicmp(data, "unc", 3) == 0)
			   || (strnicmp(data, "target", 6) == 0)
			   || (strnicmp(data, "path", 4) == 0)) {
			if (!value || !*value) {
				printk(KERN_WARNING
				       "CIFS: invalid path to network resource\n");
				return 1;	/* needs_arg; */
			}
			if ((temp_len = strnlen(value, 300)) < 300) {
				vol->UNC = kmalloc(temp_len+1,GFP_KERNEL);
				if(vol->UNC == NULL)
					return 1;
				strcpy(vol->UNC,value);
				if (strncmp(vol->UNC, "//", 2) == 0) {
					vol->UNC[0] = '\\';
					vol->UNC[1] = '\\';
				} else if (strncmp(vol->UNC, "\\\\", 2) != 0) {	                   
					printk(KERN_WARNING
					       "CIFS: UNC Path does not begin with // or \\\\ \n");
					return 1;
				}
			} else {
				printk(KERN_WARNING "CIFS: UNC name too long\n");
				return 1;
			}
		} else if ((strnicmp(data, "domain", 3) == 0)
			   || (strnicmp(data, "workgroup", 5) == 0)) {
			if (!value || !*value) {
				printk(KERN_WARNING "CIFS: invalid domain name\n");
				return 1;	/* needs_arg; */
			}
			/* BB are there cases in which a comma can be valid in
			a domain name and need special handling? */
			if (strnlen(value, 65) < 65) {
				vol->domainname = value;
				cFYI(1, ("Domain name set"));
			} else {
				printk(KERN_WARNING "CIFS: domain name too long\n");
				return 1;
			}
		} else if (strnicmp(data, "iocharset", 9) == 0) {
			if (!value || !*value) {
				printk(KERN_WARNING "CIFS: invalid iocharset specified\n");
				return 1;	/* needs_arg; */
			}
			if (strnlen(value, 65) < 65) {
				if(strnicmp(value,"default",7))
					vol->iocharset = value;
				/* if iocharset not set load_nls_default used by caller */
				cFYI(1, ("iocharset set to %s",value));
			} else {
				printk(KERN_WARNING "CIFS: iocharset name too long.\n");
				return 1;
			}
		} else if (strnicmp(data, "uid", 3) == 0) {
			if (value && *value) {
				vol->linux_uid =
					simple_strtoul(value, &value, 0);
			}
		} else if (strnicmp(data, "gid", 3) == 0) {
			if (value && *value) {
				vol->linux_gid =
					simple_strtoul(value, &value, 0);
			}
		} else if (strnicmp(data, "file_mode", 4) == 0) {
			if (value && *value) {
				vol->file_mode =
					simple_strtoul(value, &value, 0);
			}
		} else if (strnicmp(data, "dir_mode", 4) == 0) {
			if (value && *value) {
				vol->dir_mode =
					simple_strtoul(value, &value, 0);
			}
		} else if (strnicmp(data, "dirmode", 4) == 0) {
			if (value && *value) {
				vol->dir_mode =
					simple_strtoul(value, &value, 0);
			}
		} else if (strnicmp(data, "port", 4) == 0) {
			if (value && *value) {
				vol->port =
					simple_strtoul(value, &value, 0);
			}
		} else if (strnicmp(data, "rsize", 5) == 0) {
			if (value && *value) {
				vol->rsize =
					simple_strtoul(value, &value, 0);
			}
		} else if (strnicmp(data, "wsize", 5) == 0) {
			if (value && *value) {
				vol->wsize =
					simple_strtoul(value, &value, 0);
			}
		} else if (strnicmp(data, "sockopt", 5) == 0) {
			if (value && *value) {
				vol->sockopt =
					simple_strtoul(value, &value, 0);
			}
		} else if (strnicmp(data, "netbiosname", 4) == 0) {
			if (!value || !*value || (*value == ' ')) {
				cFYI(1,("invalid (empty) netbiosname specified"));
			} else {
				memset(vol->source_rfc1001_name,0x20,15);
				for(i=0;i<15;i++) {
				/* BB are there cases in which a comma can be 
				valid in this workstation netbios name (and need
				special handling)? */

				/* We do not uppercase netbiosname for user */
					if (value[i]==0)
						break;
					else 
						vol->source_rfc1001_name[i] = value[i];
				}
				/* The string has 16th byte zero still from
				set at top of the function  */
				if((i==15) && (value[i] != 0))
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					printk(KERN_WARNING "CIFS: netbiosname longer than 15 truncated.\n");
			}
		} else if (strnicmp(data, "servern", 7) == 0) {
			/* servernetbiosname specified override *SMBSERVER */
			if (!value || !*value || (*value == ' ')) {
				cFYI(1,("empty server netbiosname specified"));
			} else {
				/* last byte, type, is 0x20 for servr type */
				memset(vol->target_rfc1001_name,0x20,16);

				for(i=0;i<15;i++) {
				/* BB are there cases in which a comma can be
				   valid in this workstation netbios name (and need
				   special handling)? */

				/* user or mount helper must uppercase netbiosname */
					if (value[i]==0)
						break;
					else
						vol->target_rfc1001_name[i] = value[i];
				}
				/* The string has 16th byte zero still from
				   set at top of the function  */
				if((i==15) && (value[i] != 0))
					printk(KERN_WARNING "CIFS: server netbiosname longer than 15 truncated.\n");
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			}
		} else if (strnicmp(data, "credentials", 4) == 0) {
			/* ignore */
		} else if (strnicmp(data, "version", 3) == 0) {
			/* ignore */
		} else if (strnicmp(data, "guest",5) == 0) {
			/* ignore */
		} else if (strnicmp(data, "rw", 2) == 0) {
			vol->rw = TRUE;
		} else if ((strnicmp(data, "suid", 4) == 0) ||
				   (strnicmp(data, "nosuid", 6) == 0) ||
				   (strnicmp(data, "exec", 4) == 0) ||
				   (strnicmp(data, "noexec", 6) == 0) ||
				   (strnicmp(data, "nodev", 5) == 0) ||
				   (strnicmp(data, "noauto", 6) == 0) ||
				   (strnicmp(data, "dev", 3) == 0)) {
			/*  The mount tool or mount.cifs helper (if present)
				uses these opts to set flags, and the flags are read
				by the kernel vfs layer before we get here (ie
				before read super) so there is no point trying to
				parse these options again and set anything and it
				is ok to just ignore them */
			continue;
		} else if (strnicmp(data, "ro", 2) == 0) {
			vol->rw = FALSE;
		} else if (strnicmp(data, "hard", 4) == 0) {
			vol->retry = 1;
		} else if (strnicmp(data, "soft", 4) == 0) {
			vol->retry = 0;
		} else if (strnicmp(data, "perm", 4) == 0) {
			vol->noperm = 0;
		} else if (strnicmp(data, "noperm", 6) == 0) {
			vol->noperm = 1;
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		} else if (strnicmp(data, "mapchars", 8) == 0) {
			vol->remap = 1;
		} else if (strnicmp(data, "nomapchars", 10) == 0) {
			vol->remap = 0;
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                } else if (strnicmp(data, "sfu", 3) == 0) {
                        vol->sfu_emul = 1;
                } else if (strnicmp(data, "nosfu", 5) == 0) {
                        vol->sfu_emul = 0;
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		} else if (strnicmp(data, "posixpaths", 10) == 0) {
			vol->posix_paths = 1;
		} else if (strnicmp(data, "noposixpaths", 12) == 0) {
			vol->posix_paths = 0;
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                } else if ((strnicmp(data, "nocase", 6) == 0) ||
			   (strnicmp(data, "ignorecase", 10)  == 0)) {
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                        vol->nocase = 1;
		} else if (strnicmp(data, "brl", 3) == 0) {
			vol->nobrl =  0;
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		} else if ((strnicmp(data, "nobrl", 5) == 0) || 
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			   (strnicmp(data, "nolock", 6) == 0)) {
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			vol->nobrl =  1;
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			/* turn off mandatory locking in mode
			if remote locking is turned off since the
			local vfs will do advisory */
			if(vol->file_mode == (S_IALLUGO & ~(S_ISUID | S_IXGRP)))
				vol->file_mode = S_IALLUGO;
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		} else if (strnicmp(data, "setuids", 7) == 0) {
			vol->setuids = 1;
		} else if (strnicmp(data, "nosetuids", 9) == 0) {
			vol->setuids = 0;
		} else if (strnicmp(data, "nohard", 6) == 0) {
			vol->retry = 0;
		} else if (strnicmp(data, "nosoft", 6) == 0) {
			vol->retry = 1;
		} else if (strnicmp(data, "nointr", 6) == 0) {
			vol->intr = 0;
		} else if (strnicmp(data, "intr", 4) == 0) {
			vol->intr = 1;
		} else if (strnicmp(data, "serverino",7) == 0) {
			vol->server_ino = 1;
		} else if (strnicmp(data, "noserverino",9) == 0) {
			vol->server_ino = 0;
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		} else if (strnicmp(data, "cifsacl",7) == 0) {
			vol->cifs_acl = 1;
		} else if (strnicmp(data, "nocifsacl", 9) == 0) {
			vol->cifs_acl = 0;
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		} else if (strnicmp(data, "acl",3) == 0) {
			vol->no_psx_acl = 0;
		} else if (strnicmp(data, "noacl",5) == 0) {
			vol->no_psx_acl = 1;
		} else if (strnicmp(data, "direct",6) == 0) {
			vol->direct_io = 1;
		} else if (strnicmp(data, "forcedirectio",13) == 0) {
			vol->direct_io = 1;
		} else if (strnicmp(data, "in6_addr",8) == 0) {
			if (!value || !*value) {
				vol->in6_addr = NULL;
			} else if (strnlen(value, 49) == 48) {
				vol->in6_addr = value;
			} else {
				printk(KERN_WARNING "CIFS: ip v6 address not 48 characters long\n");
				return 1;
			}
		} else if (strnicmp(data, "noac", 4) == 0) {
			printk(KERN_WARNING "CIFS: Mount option noac not supported. Instead set /proc/fs/cifs/LookupCacheEnabled to 0\n");
		} else
			printk(KERN_WARNING "CIFS: Unknown mount option %s\n",data);
	}
	if (vol->UNC == NULL) {
		if(devname == NULL) {
			printk(KERN_WARNING "CIFS: Missing UNC name for mount target\n");
			return 1;
		}
		if ((temp_len = strnlen(devname, 300)) < 300) {
			vol->UNC = kmalloc(temp_len+1,GFP_KERNEL);
			if(vol->UNC == NULL)
				return 1;
			strcpy(vol->UNC,devname);
			if (strncmp(vol->UNC, "//", 2) == 0) {
				vol->UNC[0] = '\\';
				vol->UNC[1] = '\\';
			} else if (strncmp(vol->UNC, "\\\\", 2) != 0) {
				printk(KERN_WARNING "CIFS: UNC Path does not begin with // or \\\\ \n");
				return 1;
			}
		} else {
			printk(KERN_WARNING "CIFS: UNC name too long\n");
			return 1;
		}
	}
	if(vol->UNCip == NULL)
		vol->UNCip = &vol->UNC[2];

	return 0;
}

static struct cifsSesInfo *
cifs_find_tcp_session(struct in_addr * target_ip_addr, 
		struct in6_addr *target_ip6_addr,
		 char *userName, struct TCP_Server_Info **psrvTcp)
{
	struct list_head *tmp;
	struct cifsSesInfo *ses;
	*psrvTcp = NULL;
	read_lock(&GlobalSMBSeslock);

	list_for_each(tmp, &GlobalSMBSessionList) {
		ses = list_entry(tmp, struct cifsSesInfo, cifsSessionList);
		if (ses->server) {
			if((target_ip_addr && 
				(ses->server->addr.sockAddr.sin_addr.s_addr
				  == target_ip_addr->s_addr)) || (target_ip6_addr
				&& memcmp(&ses->server->addr.sockAddr6.sin6_addr,
					target_ip6_addr,sizeof(*target_ip6_addr)))){
				/* BB lock server and tcp session and increment use count here?? */
				*psrvTcp = ses->server;	/* found a match on the TCP session */
				/* BB check if reconnection needed */
				if (strncmp
				    (ses->userName, userName,
				     MAX_USERNAME_SIZE) == 0){
					read_unlock(&GlobalSMBSeslock);
					return ses;	/* found exact match on both tcp and SMB sessions */
				}
			}
		}
		/* else tcp and smb sessions need reconnection */
	}
	read_unlock(&GlobalSMBSeslock);
	return NULL;
}

static struct cifsTconInfo *
find_unc(__be32 new_target_ip_addr, char *uncName, char *userName)
{
	struct list_head *tmp;
	struct cifsTconInfo *tcon;

	read_lock(&GlobalSMBSeslock);
	list_for_each(tmp, &GlobalTreeConnectionList) {
		cFYI(1, ("Next tcon - "));
		tcon = list_entry(tmp, struct cifsTconInfo, cifsConnectionList);
		if (tcon->ses) {
			if (tcon->ses->server) {
				cFYI(1,
				     (" old ip addr: %x == new ip %x ?",
				      tcon->ses->server->addr.sockAddr.sin_addr.
				      s_addr, new_target_ip_addr));
				if (tcon->ses->server->addr.sockAddr.sin_addr.
				    s_addr == new_target_ip_addr) {
	/* BB lock tcon and server and tcp session and increment use count here? */
					/* found a match on the TCP session */
					/* BB check if reconnection needed */
					cFYI(1,("Matched ip, old UNC: %s == new: %s ?",
					      tcon->treeName, uncName));
					if (strncmp
					    (tcon->treeName, uncName,
					     MAX_TREE_SIZE) == 0) {
						cFYI(1,
						     ("Matched UNC, old user: %s == new: %s ?",
						      tcon->treeName, uncName));
						if (strncmp
						    (tcon->ses->userName,
						     userName,
						     MAX_USERNAME_SIZE) == 0) {
							read_unlock(&GlobalSMBSeslock);
							return tcon;/* also matched user (smb session)*/
						}
					}
				}
			}
		}
	}
	read_unlock(&GlobalSMBSeslock);
	return NULL;
}

int
connect_to_dfs_path(int xid, struct cifsSesInfo *pSesInfo,
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		    const char *old_path, const struct nls_table *nls_codepage,
		    int remap)
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{
	unsigned char *referrals = NULL;
	unsigned int num_referrals;
	int rc = 0;

	rc = get_dfs_path(xid, pSesInfo,old_path, nls_codepage, 
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			&num_referrals, &referrals, remap);
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	/* BB Add in code to: if valid refrl, if not ip address contact
		the helper that resolves tcp names, mount to it, try to 
		tcon to it unmount it if fail */

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	kfree(referrals);
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	return rc;
}

int
get_dfs_path(int xid, struct cifsSesInfo *pSesInfo,
			const char *old_path, const struct nls_table *nls_codepage, 
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			unsigned int *pnum_referrals, 
			unsigned char ** preferrals, int remap)
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{
	char *temp_unc;
	int rc = 0;

	*pnum_referrals = 0;

	if (pSesInfo->ipc_tid == 0) {
		temp_unc = kmalloc(2 /* for slashes */ +
			strnlen(pSesInfo->serverName,SERVER_NAME_LEN_WITH_NULL * 2)
				 + 1 + 4 /* slash IPC$ */  + 2,
				GFP_KERNEL);
		if (temp_unc == NULL)
			return -ENOMEM;
		temp_unc[0] = '\\';
		temp_unc[1] = '\\';
		strcpy(temp_unc + 2, pSesInfo->serverName);
		strcpy(temp_unc + 2 + strlen(pSesInfo->serverName), "\\IPC$");
		rc = CIFSTCon(xid, pSesInfo, temp_unc, NULL, nls_codepage);
		cFYI(1,
		     ("CIFS Tcon rc = %d ipc_tid = %d", rc,pSesInfo->ipc_tid));
		kfree(temp_unc);
	}
	if (rc == 0)
		rc = CIFSGetDFSRefer(xid, pSesInfo, old_path, preferrals,
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				     pnum_referrals, nls_codepage, remap);
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	return rc;
}

/* See RFC1001 section 14 on representation of Netbios names */
static void rfc1002mangle(char * target,char * source, unsigned int length)
{
	unsigned int i,j;

	for(i=0,j=0;i<(length);i++) {
		/* mask a nibble at a time and encode */
		target[j] = 'A' + (0x0F & (source[i] >> 4));
		target[j+1] = 'A' + (0x0F & source[i]);
		j+=2;
	}

}


static int
ipv4_connect(struct sockaddr_in *psin_server, struct socket **csocket, 
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	     char * netbios_name, char * target_name)
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{
	int rc = 0;
	int connected = 0;
	__be16 orig_port = 0;

	if(*csocket == NULL) {
		rc = sock_create_kern(PF_INET, SOCK_STREAM, IPPROTO_TCP, csocket);
		if (rc < 0) {
			cERROR(1, ("Error %d creating socket",rc));
			*csocket = NULL;
			return rc;
		} else {
		/* BB other socket options to set KEEPALIVE, NODELAY? */
			cFYI(1,("Socket created"));
			(*csocket)->sk->sk_allocation = GFP_NOFS; 
		}
	}

	psin_server->sin_family = AF_INET;
	if(psin_server->sin_port) { /* user overrode default port */
		rc = (*csocket)->ops->connect(*csocket,
				(struct sockaddr *) psin_server,
				sizeof (struct sockaddr_in),0);
		if (rc >= 0)
			connected = 1;
	} 

	if(!connected) {
		/* save original port so we can retry user specified port  
			later if fall back ports fail this time  */
		orig_port = psin_server->sin_port;

		/* do not retry on the same port we just failed on */
		if(psin_server->sin_port != htons(CIFS_PORT)) {
			psin_server->sin_port = htons(CIFS_PORT);

			rc = (*csocket)->ops->connect(*csocket,
					(struct sockaddr *) psin_server,
					sizeof (struct sockaddr_in),0);
			if (rc >= 0)
				connected = 1;
		}
	}
	if (!connected) {
		psin_server->sin_port = htons(RFC1001_PORT);
		rc = (*csocket)->ops->connect(*csocket, (struct sockaddr *)
					      psin_server, sizeof (struct sockaddr_in),0);
		if (rc >= 0) 
			connected = 1;
	}

	/* give up here - unless we want to retry on different
		protocol families some day */
	if (!connected) {
		if(orig_port)
			psin_server->sin_port = orig_port;
		cFYI(1,("Error %d connecting to server via ipv4",rc));
		sock_release(*csocket);
		*csocket = NULL;
		return rc;
	}
	/* Eventually check for other socket options to change from 
		the default. sock_setsockopt not used because it expects 
		user space buffer */
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	 cFYI(1,("sndbuf %d rcvbuf %d rcvtimeo 0x%lx",(*csocket)->sk->sk_sndbuf,
		 (*csocket)->sk->sk_rcvbuf, (*csocket)->sk->sk_rcvtimeo));
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	(*csocket)->sk->sk_rcvtimeo = 7 * HZ;
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	/* make the bufsizes depend on wsize/rsize and max requests */
	if((*csocket)->sk->sk_sndbuf < (200 * 1024))
		(*csocket)->sk->sk_sndbuf = 200 * 1024;
	if((*csocket)->sk->sk_rcvbuf < (140 * 1024))
		(*csocket)->sk->sk_rcvbuf = 140 * 1024;
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	/* send RFC1001 sessinit */
	if(psin_server->sin_port == htons(RFC1001_PORT)) {
		/* some servers require RFC1001 sessinit before sending
		negprot - BB check reconnection in case where second 
		sessinit is sent but no second negprot */
		struct rfc1002_session_packet * ses_init_buf;
		struct smb_hdr * smb_buf;
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		ses_init_buf = kzalloc(sizeof(struct rfc1002_session_packet), GFP_KERNEL);
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		if(ses_init_buf) {
			ses_init_buf->trailer.session_req.called_len = 32;
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			if(target_name && (target_name[0] != 0)) {
				rfc1002mangle(ses_init_buf->trailer.session_req.called_name,
					target_name, 16);
			} else {
				rfc1002mangle(ses_init_buf->trailer.session_req.called_name,
					DEFAULT_CIFS_CALLED_NAME,16);
			}

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			ses_init_buf->trailer.session_req.calling_len = 32;
			/* calling name ends in null (byte 16) from old smb
			convention. */
			if(netbios_name && (netbios_name[0] !=0)) {
				rfc1002mangle(ses_init_buf->trailer.session_req.calling_name,
					netbios_name,16);
			} else {
				rfc1002mangle(ses_init_buf->trailer.session_req.calling_name,
					"LINUX_CIFS_CLNT",16);
			}
			ses_init_buf->trailer.session_req.scope1 = 0;
			ses_init_buf->trailer.session_req.scope2 = 0;
			smb_buf = (struct smb_hdr *)ses_init_buf;
			/* sizeof RFC1002_SESSION_REQUEST with no scope */
			smb_buf->smb_buf_length = 0x81000044;
			rc = smb_send(*csocket, smb_buf, 0x44,
				(struct sockaddr *)psin_server);
			kfree(ses_init_buf);
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			msleep(1); /* RFC1001 layer in at least one server 
				      requires very short break before negprot
				      presumably because not expecting negprot
				      to follow so fast.  This is a simple
				      solution that works without 
				      complicating the code and causes no
				      significant slowing down on mount
				      for everyone else */
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		}
		/* else the negprot may still work without this 
		even though malloc failed */
		
	}
		
	return rc;
}

static int
ipv6_connect(struct sockaddr_in6 *psin_server, struct socket **csocket)
{
	int rc = 0;
	int connected = 0;
	__be16 orig_port = 0;

	if(*csocket == NULL) {
		rc = sock_create_kern(PF_INET6, SOCK_STREAM, IPPROTO_TCP, csocket);
		if